Emergency-lock.



A. BARR.

EMERGENCY LOCK.

APPLICATION FILED FEB. 7. 1917.

Patented July 3, 1917.

' ARVAL BARR, 0F NEWBURG, INDIANA.

EMERGENCY-LOCK.

Specification of Letters Patent.

Patented July 3, 1917.

Application filed February 7, 1917. Serial No. 147,180.

To all whom it may concern:

Be it known that l, ARVAL BARR, a citizen of the United States, residingat Newburg, in thecounty of VVarrick, State of Indiana, have inventedcertain new and useful Improvements in Emergency-Locks; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to emergency locks for use in banks,cashiersoffices, and like places.

The object of the invention is to provide an emergency lock which may beset in operation simultaneously with the sending of alarms to a policestation or other headquarters, the lock being electrically actuated tobe effective during the time that a suitable electric circuit is closed,the latter having been energized by a foot operative switch or similaremergency switch within reach of the cashier or other guardian.

A further object of the invention is to construct a form of electriclock for doors which will serve as an emergency device for locking thedoors of a banking room or cashiers cage until help can arrive, the lockconsisting of a rotary element which could not readily be tampered with,since it is wholly inclosed within the door body and comprises chiefly arotary element which rotates across the joint between the door and theadjacent casing or companion door at a high rate of speed so that, untilit is again brought to rest, it effectively prevents the breaking of thejoint.

A still further object of the invention is to provide such a rotarylocking element which, in itselfconstitutes an electric motor structureso that it may be readily embedded in the body of a door or within adoor frame.

With the above objects in view, and such others as may hereinafterappear, my invention will now be fully set forth and described,reference being had to the accompanying drawings In the drawings Figure1 is an elevation of a part of a door and door casing broken away toshow the installation of my invention,

Fig. 2 is an enlarged view of the locking element,

Fig. 3 is a section on line 3?) of Fig. 1, and

Fig. 4; is an elevational view of a foot actuated switch together withadiagrammatic showing of the wiring of the lock.

Referring more particularly to the drawings, 1 represents asemi-circular casing having the cover plate 2. The straight side of thecasing 1 is adapted to stand flush with the free edge of a door 3 whenthe casing is embedded therein, and is provided with a vertical slot 4through which the locking element 5 may operate. The element 5 is, ingeneral shape, a fan-like structure formed of the radiating arms 6 whichall lie upon one side of a diametricalor base arm 7. One end of the basearm 7 is weighted, so that when the element 5 is journaled within thecasing 1, all of the arms 6 will extend inside of the casing, and thearm 7 will lie substantially parallel with the straight side of thecasing, without projecting therethrough. The element 5 is journaled upona spindle 8 extending transversely through the casing at a suitablyintermediate point, and acts as the point of rotation of the element 5.A motor structure 9 is mounted upon the spindle 8 within a housing 10secured to the inner face of the door, the motor being connected in thealarm circuit as will later appear, to be energized simultaneously withth sounding of the alarm.

The switch 15 consists of a base block 16 which is pivotally mounted topreferably extend below the floor. Upon the block 16 is mounted the footpiece 17, the latter standing vertically and at the opposite end to thedepending contact element 18 which projects below the floor level.Contact elements 18 and 19 carried respectively by the element 16 andthe angle bracket 20 are adapted to interengage when the foot piece 17is actuated to close the circuit through the alarm mechanism 21 and thelock motor.

As soon as the circuit is closed, so that the motor 9 is energized, itsrapid revolution also rotates the locking element 5, so that the arms 6and 7 are thrown outwardly through the slot 4 and into the recess 22formed in the door casing or companion door, the speed with which theelement 5 rotates causing the latter to practically form acontinuous'disk across the joint between the door and the door casingwhich it is practically impossible to tamper with and Whose presence isnot evident since it does not appear upon the exterior of the door. Assoon as the circuit is broken again, "the motor is denergized so thatthe locking ele ment 5 may come to rest, by reason of the Weighted arm7, the arms 6 are caused to come to rest Within the casing 1, so thatthe door may be opened Without interference from the lock.

From the foregoing'it Will be evident that I have provided a verycomplete and efl'ectiv emergency lock for door closures, and that thenature of the lock is such that it cannot be readily tampered WithWithin the period of time 'Which is left to burglars or othersattempting to break into the inclos ure after the alarm signalshave beensent in.

What I claim as my invention is 1-- 1. An emergency lock comprising incombination With a door and its companion element having registeringrecesses, of a freely rotatable element counterweight'ed to lie WhollyWithin one of the recesses When at rest, and; mounted therein to berotated through both of the recesses, and means to continuously andrapidly rotate said element.

2. An emergency lock comprising in combinationWith a door and itscompanionelement having registering recesses, of a freely rotatableelement mounted in one of said recesses and consisting of a plurality ofarms radiating from the center of rotation and lying wholly to one sidethereof, said element being Weighted to cause it to lie Wholly Withinits recess when at rest, and means for continuously and rapidly rotatingsaid element through both of the recesses to lock the-door.

3. An emergency lockconiprising in com binationvvith a'door and itscompanion element having registering recesses, of a rosta'ry element'mounted'in one of said recesses ARVAL BARR.

Witnesses GEO. MUELLER, WM. A. l/VRIGHT.

Copies of this patent may "be obtained' for five cents each, byaddressing the Commissioner of Patents. Washington, D. G.

